Thanks.
At the time they did not know... per Wiki:
Reston virus (RESTV) is one of six known viruses within the genus Ebolavirus. Reston virus causes Ebola virus disease in non-human primates; unlike the other five ebolaviruses, it is not known to cause disease in humans, but has caused asymptomatic infections.
Reston virus was first described in 1990 as a new “strain” of Ebola virus (EBOV).
It is the single member of the species Reston ebolavirus, which is included into the genus Ebolavirus, family Filoviridae, order Mononegavirales.
Reston virus is named after Reston, Virginia, US, where the virus was first discovered.
Following the test at the CDC campus in DeKalb County, two of the monkeys who had survived Reston virus infection were infected with a very large dose of the Ebola virus in an effort to produce an Ebola vaccine. One of the two monkeys remained resistant; the second died.
The physical building in which the outbreak occurred was demolished on 30 May 1995 and a daycare center was constructed in its place.
There’s plenty of reason to treat any of those Ebola cousins as potential crowd killers. Better to err on the side of caution.
Hanta Virus may be the closest thing that we have native to the US that people need to be aware of. Not an Ebola cousin but it’s dangerous. Spread by the droppings of deer mice and a couple of other rodents. No human to human transmission. Killed someone I knew, a very athletic 30 yr old woman. It’s hard to diagnose, doctors thought it was a severe flu.